Evaluation of Natural Gas Quality by Its Calorific Value

Abstract

The article develops and analyzes a method of the comprehensive evaluation of the quality of natural gas as an energy source. The method is based on establishing the calorific value of natural gas as a determinative index of its quality, taking into account all gas properties: both those that positively affect the gas calorific value and its energy content, and those that adversely affect. The generalized definition of natural gas quality as the degree to which the set of the own gas characteristics (component composition and physical properties) meet the requirements concerning energy content, safety, ecology, and other factors is given. The results of experimental researches on natural gas quality according to the developed procedure are also presented.

Metrology and Measurement Systems

“…Example 1: In the procedure for assessing the quality of natural gas as an energy source, 8 of its main properties, which have the greatest impact on the calorific value of gas, are established [9]. They are divided into two groups.…”

“…Based on the estimated quality profile Π P,e , created according to (9), the estimated quality profile Π K,e is derived from the corresponding single estimative relative product quality indexes K e,i,1 , i = 1, . .…”

Analysis of Calorimetric Method of Measurement of Natural Gas Calorific Value

“…The largest sphere of natural gas (NG) applying today is industrial and communal services, in which gas is used as fuel. The main index of NG quality, which determines its energy value, is the specific volumetric heat of combustion or the calorific value of gas [1][2][3]. It is set as the amount of heat released during the complete combustion in the air of a certain volume of gas at constant pressure, comb p , kPa and constant temperature, Complete combustion of gas, as well as any other fuel, is observed when there are no burning gas components or components of incomplete oxidation in gaseous combustion products.…”